Feedforward controller for synchronous reluctance machines
First Claim
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1. An energy conversion system comprising:
- a bi-directional AC-to-DC electric power converter electrically interconnecting and bi-directionally exchanging electric power between a synchronous reluctance motor-generator having an all-metal rotor and a DC bus, the power exchange being controlled by a plurality of current controllers operably coupled to the converter wherein a first controller is a feedforward controller, a second controller is a feedback controller and a control voltage output of at least one controller is a function of peak current.
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Abstract
The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.
10 Citations
15 Claims
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1. An energy conversion system comprising:
a bi-directional AC-to-DC electric power converter electrically interconnecting and bi-directionally exchanging electric power between a synchronous reluctance motor-generator having an all-metal rotor and a DC bus, the power exchange being controlled by a plurality of current controllers operably coupled to the converter wherein a first controller is a feedforward controller, a second controller is a feedback controller and a control voltage output of at least one controller is a function of peak current.
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2. A synchronous reluctance machine and control system comprising:
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a bi-directional AC-to-DC electric power converter electrically interconnecting and bi-directionally exchanging electric power between a variable speed synchronous reluctance motor-generator and a DC bus; the power exchange being controlled by a plurality of current controllers operably coupled to said converter; the current controllers including a first controller that is a feedforward controller and a second controller that is a feedback controller; the first and second controllers each having a control signal output that is a function of a peak current; and
,a plurality of synchronous reluctance motor-generator dependant control voltage terms wherein one or more of said control voltage terms are summed by a current controller to produce a control voltage output operably coupled to said converter. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. An energy conversion system comprising:
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a bi-directional AC-to-DC electric power converter interconnecting and exchanging electric power between a variable speed synchronous reluctance motor-generator and a DC bus; a shaft interconnecting and exchanging mechanical energy between a mechanical energy exchange device and the synchronous reluctance motor generator; a first hybrid controller interconnecting the bi-directional AC-to-DC electric power converter and a second hybrid controller; the electric power exchange between the synchronous reluctance motor generator and the DC bus being controlled by a control voltage output of the first hybrid converter; the first hybrid controller including a first feedback controller and a feedforward controller; the second hybrid controller including a second feedback controller and a charge current regulator; and
,the first hybrid controller receiving in a first mode a signal from the second feedback controller and in a second mode a signal from the charge current regulator. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification